rose petersen writes:
Could someone please direct me to a source of high impedance
headphones (2000 ohm ) new or used.

I just attend hamfests and look in the boxes BELOW the tables for
the dirtiest crappy-looking headphones, and they are invariably
high impedance; I've acquired several that way, and they are
usually almost free!

But you do have to watch out for low-impedance headphones in the
same box; just take a VOM/DVM along for a quick test.

--
--Myron A. Calhoun.
Five boxes preserve our freedoms: soap, ballot, witness, jury, and cartridge
NRA Life Member and Rifle, Pistol, & Home Firearm Safety Certified Instructor
Certified Instructor for the Kansas Concealed-Carry Handgun license